body {
  display: flex;
  flex-flow: column nowrap;
  justify-content: center;
  align-items: center;
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
}
a {
  text-decoration: none;
}
body:after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(255, 0, 0, 0.1);
  background: url("../img/background.jpg") no-repeat center/100% 150% fixed;
  filter: blur(2px);
  z-index: -1;
}
.main {
  display: flex;
  flex-flow: column nowrap;
  justify-content: flex-start;
  align-items: center;
}
.logo {
  height: 108px;
  width: 150px;
  background: url("../img/logo.png") center/cover no-repeat;
}
.header {
  height: 111px;
  width: 381px;
  margin-top: -20px;
  background: url("../img/我的主页.png") no-repeat center;
}
.enter-btn {
  position: relative;
  height: 50px;
  width: 128px;
  text-align: center;
  color: #383838;
  border: 4px solid #383838;
  border-radius: 28px 28px;
  background: #fff;
}
.enter-btn-img {
  position: absolute;
  top: 0;
  left: 0;
  height: 50px;
  transform: scaleX(1);
  transition: all ease 0.5s;
}
.enter-btn:hover > img {
  transform: scaleX(0);
}

.enter-btn-go {
  display: inline-block;
  transform: scaleX(0);
  font: bold 24px/54px fantasy;
  transition: transform ease 0.1s;
}
.enter-btn:hover > .enter-btn-go {
  transform: scaleX(1);
  transition: transform ease 0.4s 0.45s;
}
